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Kate L

BioTour's Vegetable Oil-Powered Bus (Takoma Park, DC) on Flickr - Photo Sharing! - 0 views

flickr.com/...2318530235

veggie oil

shared by Kate L on 10 Dec 08 - Cached
  • Kate L on 10 Dec 08
     
    Read about the "Journey into a sustainable future" here: www.biotour.org/ Follow the tour on their blog: www.biotour.org/wordpress/ Learn about Waste Vegetable Oil Conversion for Diesel Bus here: www.instructables.com/id/Biotour.org-Waste-Vegetable-Oil-... Find out about DC area biodiesel resources here: www.ccurisa.org/node/90
Kate L

Solar Energy As A Sustainable Source Of European Economic Growth - 0 views

www.sciencedaily.com/...081126091621.htm

alternative fuel solar energy

shared by Kate L on 03 Dec 08 - Cached
  • Scientists from leading European research institutions in the field of solar-to-fuel energy conversion call for unified action and substantial support for novel clean fuel technologies as well as a paradigm change in Europe’s current energy policy
  • crucial if Europe is to maintain its environmental stability and economic development.
Sylvia A

Bat - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Bat

bat wikipedia

shared by Sylvia A on 05 Dec 08 - Cached
  • the only mammals naturally capable of flight
  • Bats are mammals
  • Megabats eat fruit, nectar or pollen
  • ...19 more annotations...
  • microbats eat insects, blood (small quantities of the blood of animals), small mammals, and fish
  • Mother bats usually have only one offspring per year
  • they are viviparous
  • Young microbats become independent at the age of 6 to 8 weeks
  • At the age of two years, bats are sexually mature
  • megabats not until they are four months old
  • A single bat can live over 20 years
  • Most microbats are active at night or at twilight
  • In Western Culture, the bat is often a symbol of the night and its foreboding nature
  • the rain interferes with their echo location
  • Only three species sustain themselves with blood.
  • Only 0.5% of bats carry rabies
  • Bats have very small teeth and can bite a sleeping person without being felt
  • Bats are closely associated with vampires
  • Bats are also a symbol of ghosts, death, and disease
  • Chinese lore claims the bat is a symbol of longevity and happiness
  • the bat is a trickster spirit
  • Bats rarely fly in rain
  • A measure of the success of bats is their estimated total of about 1,100 species worldwide, accounting for about 20 percent of all mammal species.
Kate L

Grolier Multimedia Encyclopedia - 0 views

gme.grolier.com/...article

energy problems

shared by Kate L on 01 Dec 08 - Cached
  • basic laws of physics dictate that energy is conserved and can only be changed from one form to another or into matter.
  • Fuel, on the other hand, is the accumulation of matter and therefore represents a store of energy.
  • released in the form of heat when the fuel is burned in chemical or nuclear reactions
  • ...39 more annotations...
  • cannot be reversed to regenerate the original fuel mass
  • a fuel problem does exist
  • If the supply of fuel is finite, not only will there be no energy supply when the fuel is exhausted
    • Kate L
      Kate L on 03 Dec 08
       
      Finite means: a form of a verb that can occur as the head of a sentence. In Sam wants to leave, wants is finite, leave is non-finite.
  • all other processes that depend on it will cease
  • Several factors combine to make the problem an urgent one
  • World population
  • demand for energy will also increase
  • coal, oil (petroleum), natural gas, uranium, and fuel wood—is limited and insufficient to sustain rapid rates of development.
  • debate about the exact length of time available before the effects of a worldwide shortage become apparent
  • shortage will occur.
  • geothermal energy, hydroelectric power, peat, ocean thermal energy, solar energy, tidal energy, wind power, and fuel wood.
  • replenish themselves naturally in a relatively short time and will therefore always be available.
  • Renewable energy resources
  • indirectly responsible for many other renewable energy sources.
  • ocean currents and winds are results of the uneven distribution of solar radiation over the Earth's surface
  • winds in turn produce waves whose energy can be utilized
  • windmills and wind power
  • ocean thermal energy, solar heating of the upper layers of the ocean produces temperature gradients that can be harnessed to generate electricity
  • Sun also powers the hydrologic cycle, in which ocean water is evaporated, transported over the continents, and precipitated as rain or snow to form rivers
  • flow energy produces hydroelectric power.
  • energy locked in such renewable fuel sources as wood and peat is derived from the Sun by the process of photosynthesis.
  • renewable energy source is geothermal energy
  • arises through the leakage of heat from the Earth's interior to the surface
  • over the entire surface of the Earth at a very low average rate, leakage is much higher in certain locations.
  • Yellowstone National Park
  • Iceland, Italy, and New Zealand.
  • possible to tap the heat and use it for human purposes.
  • Nonrenewable resources originate from two processes: (1) photosynthesis, which occurred many millions of years ago, followed by the fossilization of the plant and animal life that resulted, and (2) the formation of the Earth itself.
  • fossil fuels—coal, oil (petroleum), and natural gas;
  • produced the fuels for nuclear energy, such as uranium for fission and lighter elements for fusion
  • irreplaceable fuels represent an energy capital that must be invested wisely.
  • A cleaner-burning fuel than oil, natural gas seemed to be in abundant supply at the turn of the 21st century and, with the greatly enlarged network of gas pipelines, was rapidly growing in use.
  • nearly total dependence on fossil fuels and hydroelectricity ensures that efforts to solve energy problems by switching to alternative sources will have to overcome a great deal of inertia, both economic and psychological.
  • sources as solar power, wind power, and synthetic fuels suffer from the serious drawback that few major installations now exist.
  • handicapped by the engineering problems of converting the energy to a form useful to human beings.
  • solar energy reaches the top of the atmosphere in amounts 10,000 times greater than all human production of energy, it reaches the Earth's surface at rates of only about 80 to 250 W/m2, and considerably less on cloudy days.
  • arge-scale system based on solar-collector panels will be physically huge, causing problems of maintenance and land use
  • Wind power, wave power, and ocean-thermal-generation sources suffer from similar difficulties
    • Kate L
      Kate L on 03 Dec 08
       
      Even though there are some difficulties with working towards the alternative fuels, it may prove to be more efficient for smaller things (heat and power to small communities or single buildings) in the long run
  • Kate L on 01 Dec 08
     
    Energy Problem
cory delacruz

Cretaceous-Tertiary extinction event - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...80%93Tertiary_extinction_event

shared by cory delacruz on 09 Dec 08 - Cached
  • More has been published about the extinction of dinosaurs at the K-T boundary than any other group of organisms. Excluding a few controversial claims, it is agreed that all non-avian dinosaurs went extinct at the K-T boundary. The dinosaur fossil record has been interpreted to show both a decline in diversity and no decline in diversity during the last few million years of the Cretaceous, and it may be that the quality of the dinosaur fossil record is simply not good enough to permit researchers to distinguish between the choices.[54] Since there is no evidence that late Maastrichtian nonavian dinosaurs could burrow, swim or dive, they were unable to shelter themselves from the worst parts of any environmental stress that occurred at the K-T boundary. It is possible that small dinosaurs (other than birds) did survive, but they would have been deprived of food as both herbivorous dinosaurs would have found plant material scarce, and carnivores would have quickly found prey to be in short supply.[35] The growing consensus about the endothermy of dinosaurs (see dinosaur physiology) helps to understand their full extinction in contrast with their close relatives, the crocodilians. Cold-blooded crocodiles have very limited needs of food (they can survive several months without eating) while warm-blooded animals of similar size need much more food in order to sustain their faster metabolism. Thus, under the circumstancies of food chain disruption above mentioned, non-avian dinosaurs died [55] while some crocodiles survived. In this context, the survival of other endothermic animals, such as some birds and mammals, could be due, among other
Jilliane Velazco

The Music Industry's Last Stand Will Be A Music Tax - 0 views

www.techcrunch.com/...last-stand-will-be-a-music-tax

tax music industry

shared by Jilliane Velazco on 03 Dec 08 - Cached
  • They haven’t yet given up on trying to charge for their music, but it’s becoming more and more clear that as long as there is a free alternative (file sharing), the price of music will have to fall towards free.
  • Music Taxes Will Kill Music Innovation
  • Music industry revenues will be a set size, regardless of the quality or type of music they release.
  • ...1 more annotation...
  • Soon labels will complain that revenues aren’t high enough to sustain their businesses, and demand a higher tax. It will go up, but it will never go down.
  • Jilliane Velazco on 03 Dec 08
     
    info about music taxes and prices
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